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Portugal

$539+ Cheap flights from Portland, ME (PWM) to Portugal

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LIS
Aug 29 — Sep 51
Sat 8/29
Sat 9/5
1 adult, Economy
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Cheap flight deals from Portland to Portugal

Cheapest flights from Portland to Portugal
Explore the most affordable flight options available from Portland to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2026.

This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:55 pm
PWM
-
LIS
1 stop32h 25m
United Airlines
Tue 11/312:50 pm
LIS
-
PWM
2 stops30h 37m
United Airlines
Deal found 7/29$706
This Air Canada deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:00 am
PWM
-
LIS
2 stops22h 20m
Air Canada
Tue 11/312:50 pm
LIS
-
PWM
2 stops39h 31m
Air Canada
Deal found 7/29$709
This Air Canada deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:00 am
PWM
-
LIS
2 stops24h 05m
Air Canada
Tue 11/312:50 pm
LIS
-
PWM
2 stops39h 31m
Air Canada
Deal found 7/29$714
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/204:15 pm
PWM
-
LIS
1 stop10h 45m
Delta
Mon 11/211:30 am
LIS
-
PWM
2 stops33h 05m
Delta
Deal found 7/29$715
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/184:15 pm
PWM
-
LIS
2 stops17h 40m
Delta
Mon 11/211:30 am
LIS
-
PWM
2 stops33h 05m
Delta
Deal found 7/29$719
This KLM deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/24:15 pm
PWM
-
LIS
1 stop10h 45m
KLM
Tue 11/1011:30 am
LIS
-
PWM
2 stops17h 25m
KLM
Deal found 7/27$720
This Air France deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/24:45 pm
PWM
-
LIS
2 stops17h 25m
Multiple Airlines
Tue 11/1011:30 am
LIS
-
PWM
2 stops17h 25m
Multiple Airlines
Deal found 7/27$724
This Air France deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/24:15 pm
PWM
-
LIS
1 stop10h 45m
Air France
Tue 11/1010:00 am
LIS
-
PWM
1 stop18h 55m
Air France
Deal found 7/27$731
This United Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/168:45 am
PWM
-
OPO
1 stop19h 45m
United Airlines
Wed 11/1812:35 pm
OPO
-
PWM
1 stop11h 17m
United Airlines
Deal found 7/26$731
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:55 pm
PWM
-
LIS
1 stop32h 25m
United Airlines
Thu 10/295:00 am
LIS
-
PWM
2 stops22h 21m
United Airlines
Deal found 7/29$744
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:55 pm
PWM
-
LIS
1 stop32h 25m
United Airlines
Wed 10/286:00 am
LIS
-
PWM
2 stops21h 21m
United Airlines
Deal found 7/29$745
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/194:15 pm
PWM
-
LIS
2 stops17h 20m
Delta
Fri 10/305:00 am
LIS
-
PWM
2 stops23h 10m
Delta
Deal found 7/29$753

Find flight deals from Portland to Portugal

Keep the following information in mind while searching for Portland to Portugal flight deals. Data was last updated July 30, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$706
(United Airlines)

One-way from

$533
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$1,131
Provider with most accurate pricing for Portland-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Lisbon Humberto Delgado flights.
Search Deals
From Portland to Portugal
Search Deals
One-way flight from Portland to Portugal
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($110 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease ($116 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 30, 2026.
Use the filters below to find and compare flights from Portland to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 11/2

4:15 pm-8:00 am

1 stop10h 45m

Lisbon Humberto Delgado

Tue 11/10

11:30 am-11:55 pm

2 stops17h 25m

$720

PortlandPorto

PWM - OPO

PWMOPO

Portland

Mon 11/16

8:45 am-9:30 am

1 stop19h 45m

Porto

Wed 11/18

12:35 pm-6:52 pm

1 stop11h 17m

$731

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sat 1/16

4:48 pm-3:20 pm

2 stops41h 32m

Porto

Wed 1/20

12:35 pm-10:57 pm

2 stops39h 22m

$766

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 12/7

3:15 pm-8:10 am

1 stop11h 55m

Lisbon Humberto Delgado

Thu 12/10

5:00 am-10:57 pm

2 stops22h 57m

$776

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 12/6

11:17 am-8:10 am

1 stop15h 53m

Lisbon Humberto Delgado

Wed 12/9

11:20 am-10:57 pm

2 stops40h 37m

$779

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 11/22

5:08 pm-10:40 am

2 stops36h 32m

Lisbon Humberto Delgado

Thu 11/26

5:00 am-9:00 am

2 stops33h 00m

$796

PortlandPorto

PWM - OPO

PWMOPO

Portland

Wed 9/9

3:43 pm-6:55 am

1 stop10h 12m

Porto

Wed 9/16

6:00 am-9:23 pm

2 stops20h 23m

$931

PortlandPorto

PWM - OPO

PWMOPO

Portland

Thu 9/10

9:49 am-9:45 am

2 stops18h 56m

Porto

Thu 9/17

6:00 am-6:29 pm

2 stops17h 29m

$1,005

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sat 9/12

3:47 pm-9:45 am

1 stop12h 58m

Porto

Sat 9/19

12:20 pm-6:29 pm

2 stops35h 09m

$1,044
Cheapest one-way
Quickest one-way

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 8/22

2:40 pm-10:15 am

1 stop14h 35m

$541

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

Best time to book a flight from Portland to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Portugal

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portugal. Reviews last updated July 30, 2026.
See what other customers who have flown with United Airlines from Portland to Portugal have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,046 reviews

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
United Airlines
7.4
Good
10,046 reviews
United Airlines
7.4
Good
10,046 reviews

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this

Related info for your journey

Find useful and relevant information for your journey from Portland to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Portland to Portugal?

    For a flight from Portland to Portugal, you will be flying from Portland. Portland (PWM) is just 2.9 mi from the center of the city.

  • How long is the flight from Portland, Maine to Portugal?

    For as low as $720, KLM can have you in Portugal from Portland, Maine in 10h 45m. The distance between Portland, Maine and Portugal is about 3123 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Portland, Maine to Portugal?

    The most popular flight routes from Portland, Maine to Portugal are Portland - Lisbon Humberto Delgado, Portland - Porto and Portland - Ponta Delgada Nordela.

  • Can I find deals for flights from Portland to Portugal that include hotel bookings?

    Yes. In addition to deals on Portland to Portugal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Portugal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Portugal.

  • Can I find deals for business class flights from Portland to Portugal?

    Yes. Cheapflights offers flight deals from Portland to Portugal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Portland to Portugal

Discover the top airline that operate flights from Portland to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$707FlexibilityNo cancel feeOn-time69%

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